iOS Japanese input behavior

[lishid]

When the cursor is at the beginning of the line, composing Japanese characters on iOS's native Japanese keyboard causes the composed words to be moved to the beginning of the sentence.

Below is the relayed bug report. CodeMirror 6 - 0.18.0.

https://www.youtube.com/watch?v=_7Y6cP3Tbqw

1. Type hiragana words “こんにちはせかい”, and then try to convert them to “こんにちは世界(hello world)”.
2. When I finish the first conversion (in this case, こんにちは is not converted to kanji, but fixed as hiragana), the next word せかい moves to the beginning of the line, which messes up order of the words.
3. Finally I converted せかい to 世界, which resulted in “世界こんにちは(world hello)”.

I confirmed this problem only in iOS default Japanese keyboards (Kana/Romaji). Microsoft IME on windows and at least one third-party iOS keyboard app(ATOK) seem not to cause this problem.

I don’t know why, but when there is any character right to the cursor, this problem doesn’t happen.

[ttakuru88]

Similar #379 (comment)

[lishid]

Whoops good catch, totally forgot to check for dupes!

[marijnh]

Let's continue discussion in #379. I created a patch that solves at least one similar issue, but I wasn't able to follow the instructions you gave here (due to a lack of experience with the Japanese writing system).

[lishid]

I believe this is the same bug as #379 (comment) so your patch should be effective. Thanks again!